I'd say, the cup must be alive and was trying to make a frank on you. That goes the same with my home which I live for 20 years and have clearly memorized every part of it to the point that I could freely navigate the home even when all the lights were out but I am still tripping from time to time as if the house is alive and making a fun of me.
It was surely alive and had a grudge against me. I should have karate chopped it! I reckon you should karate chop your house as well.
I did try it once when a chair bumped in my toe but the chair still gets the final laugh after I hurt my hand in the process.
Yep, that's always a risk I suppose.